Code p2101, p2176, p1516, this are the codes what are they? on 2004 Chevrolet Trailblazer

Those are the codes on the car I need some help please.
Thank you

2 answers
All the codes relate to sensor values being out of range concerning electronic throttle control system. This should be diagnosed by a technician.
all codes pertain to throttle position issues. best you seek daig and est from your mech. there is a test procedure to follow to determine which sensor is bad.